DAC80508 - 8-channel, true 16-bit, SPI, voltage-output DAC with precision internal reference

The DACx0508 is a pin-compatible family of low power, eight-channel, bufferedvoltage-output, digital-to-analog converters (DACs) with 16-, 14- and 12-bit resolution. TheDACx0508 includes a 2.5-V, 5-ppm/°C internal reference, eliminating the need for an externalprecision reference in most applications. A user selectable gain configuration provides full-scaleoutput voltages of 1.25 V (gain = ½), 2.5 V (gain = 1) or 5 V (gain = 2). The device operates froma single 2.7-V to 5.5-V supply, is specified monotonic and provides high linearity of ±1 LSB INL.

Communication to the DACx0508 is performed through a serial interface that operates atclock rates up to 50 MHz. The VIO pin enables serial interface operation from 1.7 V to 5.5 V. TheDACx0508 flexible interface enables operation with a wide range of industry-standardmicroprocessors and microcontrollers.

The DACx0508 incorporates a power-on-reset circuit that powers up and maintains the DACoutputs at either zero scale or midscale until a valid code is written to the device. The deviceconsumes low current of 0.6 mA/channel at 5.5 V, making it suitable for battery-operated equipment.A per-channel power-down feature reduces the device current consumption to 15 µA.

The DACx0508 is characterized for operation over the temperature range of –40°C to 125°Cand is available in small packages.

• Performance
  • INL: ±1 LSB Maximum at 16-Bit Resolution
  • TUE: ±0.1% of FSR Maximum
• Integrated 2.5 V Precision Internal Reference
  • Initial Accuracy: ±5 mV Maximum
  • Low Drift: 2 ppm/°C Typical, DAC80508
• High Drive Capability: 20 mA with 0.5 V from Supply Rails
• Flexible Output Configuration
  • User Selectable Gain: 2, 1 or ½
  • Reset to Zero Scale or Midscale
  • Clear Output Function: DACx0508C
• Wide Operating Range
  • Power Supply: 2.7 V to 5.5 V
  • Temperature Range: –40˚C to 125˚C
• 50 MHz SPI Compatible Serial Interface
  • 1.7 V to 5.5 V Operation
  • Daisy Chain Operation
  • CRC Error Check
• Low Power: 0.6 mA/Channel at 5.5 V
• Small Packages:
  • 3 mm × 3 mm, 16-Pin WQFN
  • 2.4 mm x 2.4 mm, 16-Pin DSBGA

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